linux-kernel - Re: [PATCH v5 4/7] perf diff: Use hists to manage basic blocks per symbol

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Date:   Thu, 27 Jun 2019 09:27:18 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Jin Yao <yao.jin@...ux.intel.com>
Cc:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v5 4/7] perf diff: Use hists to manage basic blocks per
 symbol

On Thu, Jun 27, 2019 at 10:09:26PM +0800, Jin Yao wrote:

SNIP

> +
> +static int process_block_per_sym(struct hist_entry *he)
> +{
> +	struct annotation *notes;
> +	struct cyc_hist *ch;
> +	struct block_hist *bh;
> +
> +	if (!he->ms.map || !he->ms.sym)
> +		return 0;
> +
> +	notes = symbol__annotation(he->ms.sym);
> +	if (!notes || !notes->src || !notes->src->cycles_hist)
> +		return 0;
> +
> +	bh = container_of(he, struct block_hist, he);
> +	init_block_hist(bh);
> +
> +	ch = notes->src->cycles_hist;
> +	for (unsigned int i = 0; i < symbol__size(he->ms.sym); i++) {
> +		if (ch[i].num_aggr) {
> +			struct block_info *bi;
> +			struct hist_entry *he_block;
> +
> +			bi = block_info__new();
> +			if (!bi)
> +				return -1;
> +
> +			init_block_info(bi, he->ms.sym, &ch[i], i);
> +			he_block = hists__add_entry_block(&bh->block_hists,
> +							  NULL, &dummy_al, bi);

nit, it's the only caller of hists__add_entry_block, so we don't need
the 'ops' argument in there

other than this, this all looks good to me

Reviewed-by: Jiri Olsa <jolsa@...nel.org>

thanks,
jirka